Hi John, better that it is discovered now before the big order goes in :-) Many thanks for the update regards David Fry
On Wednesday, March 19, 2014 12:37:18 AM UTC, monahanz wrote: > Guy’s I sorry to say that I think I will have to do one more prototype > of the 16MG S100 static RAM board. A was doing some things in 80386 > protected mode and to my horror realized that RAM writes at one location > was being duplicated at another location. For example filling RAM at 80000H > also fills 280000H. Clearly address line(s) screw-up. > > > > It turns out keeping track of these address lines is more complicated that > you might think because I want to use the same mezzanine boards on this > board as on the 32MG (and later) boards that utilize fast/pipeline 32 bit > addressing (and a very different layout). > > > > Anyway seeing how many want the board I’m reluctant to chance a large > order and have everybody disappointed. > > > > So please be patient I will try and move things as fast as possible. > > > > John > > > > > > > > *From:* [email protected] <javascript:> [mailto: > [email protected] <javascript:>] *On Behalf Of *Fabio Battaglia > *Sent:* Tuesday, March 18, 2014 4:53 AM > *To:* [email protected] <javascript:> > *Subject:* Re: [N8VEM-S100:2802] A new 16MB S100 Bus static RAM board > > > > Todd, I'd like to increase my order to > 3x RAM boards + 2x mezzanine each (6 total) > > Thanks, > Fabio > > On Feb 27, 2014 2:41 PM, "Todd Goodman" <[email protected] <javascript:>> > wrote: > > I'm willing to coordinate a larger purchase and will take three of these > boards myself. > > Todd > > * monahanz <[email protected] <javascript:>> [140226 20:03]: > > > > > > Back over 2 years ago Andrew and I put together an S100 bus “4MB Static > RAM > > board” with IEE-696 8/16bit data carrying capacity. This board has > proven > > to be very popular and very reliable. Over 30 boards were already made > and > > distributed to users. However in our quest to install 16 and 32 bit > CPU’s > > on the S100 bus, 4MG has started to look like a limitation. The S100 bus > > is capable of addressing up to 16MG. For this 4 of the above boards would > > be needed. > > > > Over the past few years the price and availability of high speed static > > RAM’s have changed dramatically. It is now feasible to place 16MB of > > high speed IEE-696 8/16 bit RAM on a single board. A prototype of this > > board is described here:- > > > > > http://s100computers.com/My%20System%20Pages/16M%20RAM%20Board/16MG%20RAM%20Board.htm > > > > It’s unclear what the interest is in people obtaining a “commercial > style” > > bare board like this. I will definitely be getting 4 for myself. If you > > absolutely need one sooner rather than later let Andrew know we can > include > > you in the early “first batch”. Otherwise stay tuned for a later group > > purchase by (hopefully) a group member that will organize a larger > purchase > > - at a lower price. If there is group member right now that could > > coordinate a purchase all the better. > > > > -- > > You received this message because you are subscribed to the Google > Groups "N8VEM-S100" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] <javascript:>. > > For more options, visit https://groups.google.com/groups/opt_out. > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/groups/opt_out. > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
